High temperature packer with low temperature setting capabilitie

Details High temperature packer with low temperature setting capabilitie High temperature packer with low temperature setting capabilitie

1982-05-06

1984-04-10

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 1, 277117, 277125, 277DIG6, F16J 1506, F16J 1520, F16J 1524

Patent

active

044417217

ABSTRACT:
A packer element design for use in well bores that may be at a relatively low initial temperature and be subsequently heated to much higher temperatures. High temperature packing material of asbestos fibers impregnated with Inconel wire is employed in packer rings of frusto-conical shape which face on a center packer ring of triangular cross-section formed of the same material. Low melting point thermoplastic wafers of frusto-conical shape are interspersed at least between adjacent frusto-conical packer rings. These thermoplastic wafers soften at a relatively low well bore temperature and help to initiate a seal when squeezed between the high temperature rings as the packer is set. As the well bore temperature increases, the low melting point thermoplastic liquifies and is squeezed out from between the high temperature packer segments, which then take over the sealing function.

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